Enable Pepper threading on all channels.

chrome/test/ppapi/ppapi_test.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/test/ppapi/ppapi_test.h"
 
 #include "base/command_line.h"
 #include "base/file_util.h"
 #include "base/logging.h"
 #include "base/path_service.h"
@@ skipping 114 matching lines @@
 
   // The test sends us the result via a cookie.
   command_line->AppendSwitch(switches::kEnableFileCookies);
 
   // Some stuff is hung off of the testing interface which is not enabled
   // by default.
   command_line->AppendSwitch(switches::kEnablePepperTesting);
 
   // Smooth scrolling confuses the scrollbar test.
   command_line->AppendSwitch(switches::kDisableSmoothScrolling);
-
-  // Enable threading since we test that feature.
-  command_line->AppendSwitch(switches::kEnablePepperThreading);
 }
 
 void PPAPITestBase::SetUpOnMainThread() {
   // Always allow access to the PPAPI broker.
   browser()->profile()->GetHostContentSettingsMap()->SetDefaultContentSetting(
       CONTENT_SETTINGS_TYPE_PPAPI_BROKER, CONTENT_SETTING_ALLOW);
 }
 
 GURL PPAPITestBase::GetTestFileUrl(const std::string& test_case) {
   FilePath test_path;
@@ skipping 186 matching lines @@
     const std::string& base,
     const std::string& test_case) {
   return StringPrintf("%smode=nacl_newlib&testcase=%s", base.c_str(),
                       test_case.c_str());
 }
 
 void PPAPIBrokerInfoBarTest::SetUpOnMainThread() {
   // The default content setting for the PPAPI broker is ASK. We purposefully
   // don't call PPAPITestBase::SetUpOnMainThread() to keep it that way.
 }